JEE Main levelSingle correct optionDifficulty 2 of 3sc073
According to the adsorption theory of heterogeneous catalysis, the correct sequence of events is
Adiffusion of reactants to the surface, adsorption, reaction on the surface, desorption of products, diffusion of products away
Badsorption, diffusion of reactants to the surface, desorption of products, reaction on the surface, diffusion away
Cdiffusion of reactants, reaction in the gas phase, adsorption of products, desorption, diffusion away
Dreaction on the surface, adsorption of products, diffusion of reactants, desorption, diffusion away
Answer: A
Reactant molecules diffuse to the surface and are adsorbed on active centres, react there to form an adsorbed product, which then desorbs, freeing the site, and diffuses away.